Sheet-registration and feeding apparatus
US4645195A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Jul 3, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S271/902
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A document printer includes sheet-feeding apparatus for sequentially presenting both faces of a print-receiving sheet to a print station. According to a preferred embodiment, such apparatus features, as part of the duplex sheet path, reversible sheet-feeding means operable in first or second active modes for selectively feeding sheets into and out of a chute, located upstream from the feeding means, to reverse the sheet's lead edge/trail edge orientation. Such sheet-feeding means is also operable in a passive mode in which it allows sheets to advance, without substantial interference, downstream therepast to a registration position. Control means are provided for switching the feeding means from one of its active modes to its passive mode after a sheet has been advanced into the reversing chute to the extent that the sheet buckles, whereupon the restoring force in the sheet propels the leading edge of the sheet past the feed means and into engagement with a registration gate located at the registration position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.